In this paper, we propose a novel SPR sensor based on a
side-polished hollow core photonic crystal fiber. The design involves precise polishing of the base
fiber to form a uniform planar surface, upon which is deposited a gold
film; in addition, the hole along the center of the fiber is filled
with a
liquid [1]}, [2]},
the composition of which can be chosen to tune the core refractive
index. The propagating light will be confined in the fiber core,
mainly in the liquid-filled region. By changing the ratio of liquid
mixture, we tuning the refractive index of the fiber liquid core. The
numerical model will uncover how the filling liquid affects the
coupling of the core mode and the plasmonic mode and moves the phase
matching point, which is the fundamental to improve the sensor
performance, as characterized by its sensitivity.
